English verb conjugation MUST SUB

Regular verb: sub - subbed - subbed

Affirmation

Simple form

I must sub
you must sub
he must sub
we must sub
you must sub
they must sub

V-ing form

I must be subbing
you must be subbing
he must be subbing
we must be subbing
you must be subbing
they must be subbing

Perfect

I must have subbed
you must have subbed
he must have subbed
we must have subbed
you must have subbed
they must have subbed

V-ing perfect

I must have been subbing
you must have been subbing
he must have been subbing
we must have been subbing
you must have been subbing
they must have been subbing

Negation

Simple form

I mustn't sub
you mustn't sub
he mustn't sub
we mustn't sub
you mustn't sub
they mustn't sub

V-ing form

I mustn't be subbing
you mustn't be subbing
he mustn't be subbing
we mustn't be subbing
you mustn't be subbing
they mustn't be subbing

Perfect

I mustn't have subbed
you mustn't have subbed
he mustn't have subbed
we mustn't have subbed
you mustn't have subbed
they mustn't have subbed

V-ing perfect

I mustn't have been subbing
you mustn't have been subbing
he mustn't have been subbing
we mustn't have been subbing
you mustn't have been subbing
they mustn't have been subbing

Interrogative form

Simple form

must I sub?
must you sub?
must he sub?
must we sub?
must you sub?
must they sub?

V-ing form

must I be subbing?
must you be subbing?
must he be subbing?
must we be subbing?
must you be subbing?
must they be subbing?

Perfect

must I have subbed?
must you have subbed?
must he have subbed?
must we have subbed?
must you have subbed?
must they have subbed?

V-ing perfect

must I have been subbing?
must you have been subbing?
must he have been subbing?
must we have been subbing?
must you have been subbing?
must they have been subbing?

Interro-negative form

Simple form

mustn't I sub?
mustn't you sub?
mustn't he sub?
mustn't we sub?
mustn't you sub?
mustn't they sub?

V-ing form

mustn't I be subbing?
mustn't you be subbing?
mustn't he be subbing?
mustn't we be subbing?
mustn't you be subbing?
mustn't they be subbing?

Perfect

mustn't I have subbed?
mustn't you have subbed?
mustn't he have subbed?
mustn't we have subbed?
mustn't you have subbed?
mustn't they have subbed?

V-ing perfect

mustn't I have been subbing?
mustn't you have been subbing?
mustn't he have been subbing?
mustn't we have been subbing?
mustn't you have been subbing?
mustn't they have been subbing?

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